const CryptoJS = require('crypto-js') // 引用AES源码js

const key = CryptoJS.enc.Utf8.parse('1234123412ABCDEF') // 十六位十六进制数作为密钥
const iv = CryptoJS.enc.Utf8.parse('ABCDEF1234123412') // 十六位十六进制数作为密钥偏移量

// 加密方法
function Encrypt(word) {
  const srcs = CryptoJS.enc.Utf8.parse(word)
  const encrypted = CryptoJS.AES.encrypt(srcs, key, {
    iv: iv,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.Pkcs7
  })
  return encrypted.ciphertext.toString().toUpperCase()
}

// 解密方法
function Decrypt(word) {
  const encryptedHexStr = CryptoJS.enc.Hex.parse(word)
  const srcs = CryptoJS.enc.Base64.stringify(encryptedHexStr)
  const decrypt = CryptoJS.AES.decrypt(srcs, key, {
    iv: iv,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.Pkcs7
  })
  const decryptedStr = decrypt.toString(CryptoJS.enc.Utf8)
  return decryptedStr.toString()
}

const desKey = CryptoJS.enc.Utf8.parse('1')

// DES加密方法
function desEncrypt(message) {
  const encrypted = CryptoJS.DES.encrypt(message, desKey, {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
  })
  return encrypted.toString()
}
// DES解密方法
function desDecrypt(ciphertext) {
  if (ciphertext === '' || ciphertext === null || ciphertext === undefined) {
    return ''
  }
  if (typeof ciphertext !== 'string') {
    ciphertext = ciphertext.toString()
  }
  // 为解决返回url自动把加密转义
  ciphertext = ciphertext.replace(/%2F/g, '/')
  ciphertext = ciphertext.replace(/%20/g, '+')
  ciphertext = ciphertext.replace(/ /g, '+')
  ciphertext = ciphertext.replace(/%3D/g, '=')
  var decrypted = CryptoJS.DES.decrypt(
    {
      ciphertext: CryptoJS.enc.Base64.parse(ciphertext)
    },
    desKey,
    {
      mode: CryptoJS.mode.ECB,
      padding: CryptoJS.pad.Pkcs7
    }
  )
  return decrypted.toString(CryptoJS.enc.Utf8)
}

export default {
  Encrypt,
  Decrypt,
  desEncrypt,
  desDecrypt
}

